Description (CNA)
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to validate team-specific upload_file permissions which allows a guest user to post files in channels where they lack upload_file permission via uploading files in a team where they have permission and reusing the file metadata in a POST request to a different team. Mattermost Advisory ID: MMSA-2025-00553
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Mattermost / Mattermost | affected 11.3.0 through 11.3.0; affected 11.2.0 through 11.2.2; affected 10.11.0 through 10.11.10; unaffected 11.4.0; unaffected 11.3.1; unaffected 11.2.3; unaffected 10.11.11 |
CWE
CWE-863
References
ADP enrichment
No English description supplied.
No references supplied.